Robert hitchcock



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ROBERT HITCHCOCK, OF SPRINGFIELD, MASSACHUSETTS.

Letters Patent No. 67,877, dated Agust 20, 1867.

- fl IMPROVEMENT INcAR-VENTILATGRS'.

'ro ALL wnoM 1T MA'Y coNcERN :a

Be it known that I,` ROBERT H-iTcHcOc-Lof Springfield, Hampden county, Commonwealth of Massachusetts, have invented certain new and useful Improvements in Car-Ventilators; `and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the 'letters of reference marked thereon. In the drawings- Figure I is a side section of my invention, and

Figure2 a front view of the same. lMy invention consists in forming a car-ventilator for the sides of cars, so arranged that the cinders and `dust will not penetrate into thecar while the current of fresh air is being forced through', but be warded off from the ventilator openings, and either caught by the same or allowed to pass on by. In order to 'accomplish this, I form my ventilator as Iwill now describe, referring to the figures.

The case is made with a single thickness of sheet metal, or similar substance, and is formed so as to be placed on the side of the car, as shown in iig. 2. An opening at each end, the entire width of the case A at B and B', allows the air to enter at either side, according to the direction in which thc caris moving. A funnelshnped opening is made at each end by the pieces C and C', which extend downwards, .converging towards each other, but leavingia' space, a, between their lower edges, between which is suspended a valve, E, the axis of which is a littleabove the horizontal line of the lower edgesof the converging pieces C and C. This valve E hangs down vnearly to the bottom ofthe case, and extends upwards above. its axis a short distance at b', where the top ,is capped with a piece, c, projecting on both sides Aof the valve. In the side next the car, in the top'of' the case A, is the opening F for the air to pass through into the car. This opening has :i ilange, e, projecting all around its edge, serving as an additional preventive to the passage of cinders.

The operation of this/'is asfllows; In fig.; wewill suppose the cnr going in therdirection indicated by lthe arrow. In this case the valve is blown back, as shown by red lines throwing its-top part forward. The nir rushing through the opening B is forccdup infront of the valve, following the course of the small arrows shown in the figure, while the cinders and other heavy foreign matter are deliected by the valve and pass out between theilower'edge of the latter andthe bottom of tliecuse. Should any, by accident, get above the valve there would be very ,little possibility of their getting through the vent-hole into the car, owing to the tortuous route they would be compelled to follow. By this means I obtain a very simple and useful ventilator, and on'e that can be cheaply constructed. Various'small alterations in proportions of parts may be made to suit summer and winter use willhout aifecting the principle and general construction and arrangement of the whole.

New, having described my invention, what -I' claim as new, and desire to secure by Letters Patent, is-

The combination of the valve E, having the cap c, with `the case A., having the pieces C and C and venthole F, the whole being constructed and arranged substantially as herein described.

. ROBERT HITCHCOCK.

Witnesses:

Enwsnp H. HYDE, R.. F. HYDE. 

